studies of other species indicate that fishing pressure has had little effect in 

 reducing their ahtindanoe* 



It has become increasingly apparent that there is a high potential 

 production of fish at present unutilized in Lake Raron. It is estimated that at 

 least 2000 tons of fish now unutilized are available each year in the Manitoulln 

 Island area* One of the principal problems facing the laboratory is that of 

 developing uses for this production* Smelt , which are the most namerous species 

 in terms of numbers and total weight, have been processed and sold as both human 

 and animal food* About 80 tons of smelt were frozen in 195^ and the major portion 

 sold to local mink ranchers* A small amount of frozen cooked fish have been 

 supplied each year to the Ontario Veterinary College , Guelph| which is engaged 

 in testing fish diets for mink* 



Other projects at South Bay incltlde plantings to re-establish lake trout| 

 introduction of the speckled -lake trout hybrids , studies of lamprey predation in 

 Lake Huroui and routine hydrographio observations* 



Lake Erie 



Investigations of a general nature were initiated on Lake Brie in 1953* 

 These were followed in 195^ by a closer examination of the fish populations* 

 Boutlne examinations of the oommerolal catch were started to provide , among other 

 things I the age structure of the various populations* This is basic information 

 for any proper understanding of the factors affecting abundance* To supplement 

 these data some 2000 fish were tagged and their movements throughout the lake 

 followed by the information provided by recaptures* 



A general economic study was commenced in 195^ to consider annual fluo- 

 taatlons in fish produotloni the value of production, level of employment, and the 

 relative earning power of persons employed in the fishing Industry on Lake Erie* 



Lake Ontario 



The research program on Lake Ontario was largely concerned with continued 

 •tudies of the Bay of Quinte whitefish population* Since 19Mf plantings in 

 alternate years have been made without significant effect on the production of 

 whitefish in the Bay of Quinte area* Detailed examination of the population has 

 now been started to discover some other way of increasing production* Tagging 



X8 



